Chris Impey receives funding from the National Science Foundation and the Hearst Foundation. Curious Kids is a series for children of all ages. If you have a question you’d like an expert to answer, ...

Ever since interstellar object 3I/ATLAS streaked into our solar system, astronomers have been scrambling to understand how this likely comet got here—and more importantly, perhaps, where it came from.

Gather around everybody, ’cause it’s time for another entry into our notebook, Surreal Creatures from the Lightless Depths of the Ocean. This time around, we’re peering at the Translucent Deepstaria ...

The scientific community is embroiled in a heated debate over the origin of a mysterious interstellar object that entered our solar system last month. While NASA initially identified the object, named ...

In January 2018, scientists gazing out beyond the known objects of the Solar System spotted something new: A small object, seemingly bound in orbit around the Sun. Scientists nicknamed this speck ...